Ultra ATA 66 and ATA 66 Difference?

[Guest]

Is there a difference between Ultra ATA 66 and ATA 66. Compaq said that my computer supported ATA 66. The harddrive I'm looking at is a Western Digital 40 Gig 7200 RPM EIDE drive, it requires ULtra ATA 100, or Ultra ATA 66. So is there any difference and will that work.

-Mark

 

[ledzepp98]

afak it's the same, like ata66=dma66=udma66

 

[Guest]

Actually UDMA4 = ATA66 or Ultra ATA66. DMA66 isn't really correct but someone probably means ATA66 when they say that.
ATA100 is backwards compatible so the ATA100 drive you are looking at should work, but only at ATA66. Don't worry though there isn't much of a difference between ATA66 and 100 as the best drives rarely go faster than 40MB/s.

 

[Arrow]

The drive you're looking at won't require ATA100, it'll only support up to ATA100.

Rob
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